KR970009549B1 - Telephone power detector - Google Patents
Telephone power detector Download PDFInfo
- Publication number
- KR970009549B1 KR970009549B1 KR94027377A KR19940027377A KR970009549B1 KR 970009549 B1 KR970009549 B1 KR 970009549B1 KR 94027377 A KR94027377 A KR 94027377A KR 19940027377 A KR19940027377 A KR 19940027377A KR 970009549 B1 KR970009549 B1 KR 970009549B1
- Authority
- KR
- South Korea
- Prior art keywords
- power
- telephone
- signal
- supply
- light
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/08—Current supply arrangements for telephone systems with current supply sources at the substations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/22—Illumination; Arrangements for improving the visibility of characters on dials
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Abstract
A power discrimination detection apparatus of a telephone changes an algorithm without making an additional switch circuit and another circuit, and simply sets a hardward function. Accordingly, in a telephone using an auxiliary power device in case of a power failure, the power discrimination detection apparatus easily detects whether a present power is a main power or an auxiliary power, and prevents a malfunction of the telephone. The apparatus includes: a main power-supply(10) for providing an externally-supplied power; auxiliary power-supply(20) for providing a power to a telephone when there is no power applied from the main power-supply(10) to the telephone; a power discrimination detector(30) for determining whether the power supplied to the telephon is from the main power-supply(10) or from the auxiliary power-supply(20); a controller(40) for generating a control signal after receiving a determined signal from the power discrimination detector(30); and a display driver(50) for outputting a light-on signal or light-off signal according to a control signal from the controller(40); and a display(60) which is turned on or off according to the light-on signal or the light-off signal from the display driver(50).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR94027377A KR970009549B1 (en) | 1994-10-26 | 1994-10-26 | Telephone power detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR94027377A KR970009549B1 (en) | 1994-10-26 | 1994-10-26 | Telephone power detector |
Publications (2)
Publication Number | Publication Date |
---|---|
KR960016366A KR960016366A (en) | 1996-05-22 |
KR970009549B1 true KR970009549B1 (en) | 1997-06-14 |
Family
ID=19395893
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR94027377A KR970009549B1 (en) | 1994-10-26 | 1994-10-26 | Telephone power detector |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR970009549B1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3051716B1 (en) * | 2016-05-31 | 2020-09-25 | Saint Gobain | LAMINATED GLAZING WITH A FUNCTIONAL LAYER DEMARGED |
-
1994
- 1994-10-26 KR KR94027377A patent/KR970009549B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR960016366A (en) | 1996-05-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
G160 | Decision to publish patent application | ||
E701 | Decision to grant or registration of patent right | ||
GRNT | Written decision to grant | ||
FPAY | Annual fee payment |
Payment date: 20000407 Year of fee payment: 6 |
|
LAPS | Lapse due to unpaid annual fee |